A second study of psychological changes during the first year following prefrontal lobotomy.

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Abstract
In the present study 15 lobotomized and 10 control patients were selected as subjects and tested individually prior to and 2 weeks, 3 months, and 1 year following lobotomy. Both operated and control patients were tested at comparable intervals. Predictions of the direction of net change in the operated group did not differ significantly from chance.